To link to the entire object, paste this link in email, IM or documentTo embed the entire object, paste this HTML in websiteTo link to this page, paste this link in email, IM or documentTo embed this page, paste this HTML in website

posts or runners at the bottom of the fifth level, and likewise to the sixth level. If this technique is used,
the scaffold should be tied at the “ k” function level.
On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts must be
installed diagonally in both directions and must extend from the base of the end posts upward to the top
of the scaffold at approximately a 45 degree angle. When the length of the scaffold is greater than the
height, such bracing must be repeated starting at least with every fifth post. When the length is shorter
than the height, such bracing must be installed from the base of end posts upward to the opposite end
posts and then in alternating directions until the top of the scaffold is reached.
In situations where the attachment of bracing to posts is precluded, the bracing must be attached to
the runners. Bearers must be installed transversely between the posts, and when coupled to the posts,
the inboard coupler must bear directly on the runner coupler. When the bearers are coupled to the run-ners,
the couplers must be as close to the posts as possible. Bearers must extend beyond the posts and
runners and provide full contact with the coupler.
The scaffold must have runners installed along its length along both the inside and outside posts at the
various level heights. Runners must be interlocked on straight runs to create continuous lengths and be
coupled to each post. Bottom runners should be located as close to the base as possible. Couplers must be
made of structural metal. When platforms are being moved to the next level, the existing platform must
be left undisturbed until new bearers have been set in place and braced prior to receiving the new plat-forms.
Mobile
A mobile scaffold is a powered or nonpowered, portable, caster or wheel- mounted supported scaffold
( see figure 5). Mobile scaffolds constructed of tube and coupler components or of fabricated frames must
conform to design, construction and loading requirements for those scaffolds. The scaffolds must be
braced by cross, horizontal or diagonal braces, or combination thereof, to prevent racking or collapse; ver-tical
members must be secured together laterally so that vertical members are squared and aligned.
Cross, horizontal or diagonal braces, or a combination, must be used to prevent collapse and secure verti-cal
members laterally so that vertical members are squared and aligned.
Scaffolds must be plumb, level and squared. All brace connections must be secured. Platforms should
not extend past the base supports unless outrigger frames or equivalent devices are used to ensure stabil-ity.
A rolling scaffold load capacity is also limited by the weight its casters can support. Platforms should
not extend past the base supports unless outrigger frames are used. A rolling scaffold load capacity is also
limited by the weight its casters can support.
Caster and wheel stems must be pinned or otherwise secured in scaffold legs. While in a stationary
position, casters and wheels must be locked with a positive wheel and/ or wheel and swivel locks, or equiv-alent
means, to prevent movement.
Employees should not be allowed to ride on a mobile scaffold unless strict controls are followed ( level
and unobstructed surfaces, a height ratio to width of not more than two to one, slow speed of movement,
confinement of employees within the scaffold frame, etc.) When manual force is used to move the scaffold,
the force should be applied as close to the base as practicable, but not more than 5' above the supporting
surface ( i. e., scaffold base or wheels when a powered system is used). Powered systems used to propel
mobile scaffolds must be designed for such use. Forklifts, trucks, similar motor vehicles or add- on motors
should not be used to propel scaffolds unless the scaffold is designed for such propulsion systems.
Pole Scaffold
A single pole scaffold is a supported scaffold consisting of platforms resting on bearers, the outside
ends of which are supported on runners ( ledgers or ribbons) secured to a single row of posts or uprights,
and the inner ends of which are supported on or in a structure or building wall. A double pole ( indepen-dent
pole) scaffold is a supported scaffold consisting of platforms resting on cross beams supported by
ledgers and a double row of uprights independent of support ( except for ties, guys and braces) from any
structure.
23

posts or runners at the bottom of the fifth level, and likewise to the sixth level. If this technique is used,
the scaffold should be tied at the “ k” function level.
On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts must be
installed diagonally in both directions and must extend from the base of the end posts upward to the top
of the scaffold at approximately a 45 degree angle. When the length of the scaffold is greater than the
height, such bracing must be repeated starting at least with every fifth post. When the length is shorter
than the height, such bracing must be installed from the base of end posts upward to the opposite end
posts and then in alternating directions until the top of the scaffold is reached.
In situations where the attachment of bracing to posts is precluded, the bracing must be attached to
the runners. Bearers must be installed transversely between the posts, and when coupled to the posts,
the inboard coupler must bear directly on the runner coupler. When the bearers are coupled to the run-ners,
the couplers must be as close to the posts as possible. Bearers must extend beyond the posts and
runners and provide full contact with the coupler.
The scaffold must have runners installed along its length along both the inside and outside posts at the
various level heights. Runners must be interlocked on straight runs to create continuous lengths and be
coupled to each post. Bottom runners should be located as close to the base as possible. Couplers must be
made of structural metal. When platforms are being moved to the next level, the existing platform must
be left undisturbed until new bearers have been set in place and braced prior to receiving the new plat-forms.
Mobile
A mobile scaffold is a powered or nonpowered, portable, caster or wheel- mounted supported scaffold
( see figure 5). Mobile scaffolds constructed of tube and coupler components or of fabricated frames must
conform to design, construction and loading requirements for those scaffolds. The scaffolds must be
braced by cross, horizontal or diagonal braces, or combination thereof, to prevent racking or collapse; ver-tical
members must be secured together laterally so that vertical members are squared and aligned.
Cross, horizontal or diagonal braces, or a combination, must be used to prevent collapse and secure verti-cal
members laterally so that vertical members are squared and aligned.
Scaffolds must be plumb, level and squared. All brace connections must be secured. Platforms should
not extend past the base supports unless outrigger frames or equivalent devices are used to ensure stabil-ity.
A rolling scaffold load capacity is also limited by the weight its casters can support. Platforms should
not extend past the base supports unless outrigger frames are used. A rolling scaffold load capacity is also
limited by the weight its casters can support.
Caster and wheel stems must be pinned or otherwise secured in scaffold legs. While in a stationary
position, casters and wheels must be locked with a positive wheel and/ or wheel and swivel locks, or equiv-alent
means, to prevent movement.
Employees should not be allowed to ride on a mobile scaffold unless strict controls are followed ( level
and unobstructed surfaces, a height ratio to width of not more than two to one, slow speed of movement,
confinement of employees within the scaffold frame, etc.) When manual force is used to move the scaffold,
the force should be applied as close to the base as practicable, but not more than 5' above the supporting
surface ( i. e., scaffold base or wheels when a powered system is used). Powered systems used to propel
mobile scaffolds must be designed for such use. Forklifts, trucks, similar motor vehicles or add- on motors
should not be used to propel scaffolds unless the scaffold is designed for such propulsion systems.
Pole Scaffold
A single pole scaffold is a supported scaffold consisting of platforms resting on bearers, the outside
ends of which are supported on runners ( ledgers or ribbons) secured to a single row of posts or uprights,
and the inner ends of which are supported on or in a structure or building wall. A double pole ( indepen-dent
pole) scaffold is a supported scaffold consisting of platforms resting on cross beams supported by
ledgers and a double row of uprights independent of support ( except for ties, guys and braces) from any
structure.
23